RESUMO
Objective: To investigate the low polarity components in the stems of Uvaria macrophylla Roxb. var.microcarpa(Champ.)Finet et Gagnep.(Annonaceae). Methods: The dry stems of the title plant were extracted by re-fluxing with 95% ethylalcohol(80℃),and the obtained aqueous alcohol solution was evaporated to remove alcohol,andthen the ethyl alcohol extracts were extracted with petroleum ether(PE)to obtain a PE extract. The chemical constitu-ents in the PE extract were analyzed by GC-MS and identified by comparison of the obtained MS data with the standardmass spectral data. The relative contents in percentage were calculated for the constituents using the area normalizationmethod. Results: Ten compounds were identified,in which the palmitic acid(16.76%),4(14)- 11- eucalypene(15.31%),and selinene(14.45%)were the main components. Conclusion: The low polarity components in the stemsof Uvaria macrophylla Roxb. var. microcarpa(Champ.)Finet et Gagnep. mainly consisted of naphthalenes(31%),fol-lowed by sesquiterpenoids(29.76%).